import java.util.List;

// Press Shift twice to open the Search Everywhere dialog and type `show whitespaces`,
// then press Enter. You can now see whitespace characters in your code.
public class Main {
    public static void main(String[] args) {
        Test test = new Test();
        List<List<Integer>> list = test.permute(new int[]{1,2,3});
        System.out.println(666);
    }
}